Perhaps you should try some spelling variations:
methodik leitfaden » technik leitfaden, methodischer leitfaden
trubner technik » uber technik, struktur technik
trigger technik » triggers technical, trigger mechanism
leber methodik » neuer methodik, der methodik, einer methodik
uber methodik » der methodik, uber methoden, uber methode

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((trubner technik) OR (trigger technik)) leitfaden ) OR ((( uber methodik leitfaden ) OR ( leber methodik leitfaden )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((trubner technik) OR (trigger technik)) leitfaden ) or ((( uber methodik leitfaden ) or ( leber methodik leitfaden ))))".
• Adding a wildcard symbol may retrieve word variants: (( ((trubner technik) OR (trigger technik)) leitfaden ) or ((( uber methodik leitfaden ) or ( leber methodik leitfaden ))))*.